SLC16A2 and hyperinsulinemic hypoglycemia, familial, 4: In a recent case report, early intervention with tiratricol in a boy diagnosed with MCT8 deficiency at twenty-one months found that, after a year of treatment, there were significant improvements in both neuronal and endocrinological symptoms, with improvement in head control, increase in body weight, and normal heart rate and blood pressure all recorded (56).